Core components of the Sun Java System Web Server 7.0 are now available as open source. Re-named Open Web Server 1.0, Sun Microsystems has released the server under the BSD license.

According to Sun, Open Web Server is a highly scalable multi-threaded engine capable of dealing with hundreds of thousands HTTP connections simultaneously. The server comes with SSL, CGI, FastCGI and its own NSAPI interface.

Open Web has its origins in Netscape's Commerce Server and further developed as Netscape Enterprise Server (NES), iPlanet Web Server and Sun ONE Web Server.

There are no binary packages of Open Web Server 1.0 currently available for download, but instructions for installation from the source code can be found at the Sun Wiki. It is compatible with Ubuntu 8.10, Fedora 9 and 10, Debian Lenny, openSUSE 11.0 and OpenSolaris 2008.11.